185results about How to "Suppress instability" patented technology

An optical apparatus design and method for suppressing cladding-mode gain in fiber- and other waveguide-amplification devices. In some embodiments, a signal-wavelength-absorbing core or region is included within the pump cladding or the pump waveguide, in order to absorb signal-wavelength radiation that occurs in the regions where only pump-wavelength radiation is wanted. This absorbing region prevents cladding-mode gain, thus preserving more pump-wavelength excitation for amplifying the desired signal radiation. In other embodiments, the refractive-index profile of the fiber or other waveguide is adjusted to reduce the numeric aperture and thus reduce the angle of light that will remain in the cladding. Since amplified spontaneous emission (ASE) occurs at all angles, a lower-NA fiber will leak a higher proportion of ASE (since a relatively lower portion of the ASE radiation is within the smaller angle that is retained within a low-NA fiber), while pump light, which was introduced into the fiber within the lower-NA angle will remain in the cladding.

A p well serving as a channel region of a MOSFET is formed on one side of an n− layer and an n+ drain region is formed on the other side. Above the n− layer, a plurality of first floating field plates are formed with a first insulating film interposed therebetween. A plurality of second floating field plates are formed thereon with a second insulating film interposed therebetween. Assuming that the thickness of the first insulating film is “a” and the distance between the first floating field plates and the second floating field plates in a direction of thickness of the second insulating film is “b”, a relation a>b is held.

The present inventors revealed that deamidation of an antibody can be suppressed without influencing its activity by substituting a glycine that is located adjacent to an asparagine with another amino acid.

A vehicle is provided with: an EPS a VGRS actuator as a rudder angle varying device; and an EPS actuator as a steering torque assisting device. In following a target driving route, a LKA target assist torque TLK is outputted from the EPS actuator on the basis of target lateral acceleration GYTG. On the other hand, in order to suppress the steering of a steering wheel by the assist torque, which is against a driver's will, steered wheels are steered by the VGRS actuator, excessively by a LKA correction target angle θLK. At this time, it does not influence a relation between a steering angle and the rotation angle of a lower steering shaft. Thus, the following for the target driving route is realized without reducing the robustness of the vehicle with respect to the driver's steering.

A resonator for damping pressure waves or instabilities in a system supported by acoustic energy wherein the resonator adopts the use of counter-bored openings on the downstream side of the resonator within the flow path of the system. The resonator includes a first member and a second member where the second member includes a plurality of openings therethrough with each hole having a counter-bore on its upstream side. The first member has a size substantially smaller than the diameter of said flow path and a first plurality of openings therethrough. The openings are in fluid communication with the flow path. The second member has a size generally equal to the first member and a second plurality of openings therethrough, which openings are in fluid communication with the flow path.

A laser apparatus includes a semiconductor laser element, a surface-emitting semiconductor element including a first mirror, and a second mirror. The semiconductor laser element emits first laser light having a first wavelength. The surface-emitting semiconductor element is excited with the first laser light, and emits second laser light having a second wavelength which is longer than the first wavelength. The first mirror in the surface-emitting semiconductor element is arranged on one side of the first active layer. The second mirror is arranged outside the surface-emitting semiconductor element so that the first and second mirrors form a resonator in which the second laser light resonates. The surface-emitting semiconductor element includes a structure for controlling a spatial mode of the second laser light.

A Hall-type ion source for generation of ion beams for technological applications presents itself a hybrid ion source, where properties of closed drift systems and end-Hall ion sources are combined for more efficient operation. An ion source has shorter central magnetic pole than regular closed drift ion source with magnetic screens that provide positive magnetic gradient in an ion source's discharge channel. An ion source with these combined properties has higher ratio of ion beam current to discharge current than end-Hall ion source and wider range of discharge parameters than closed drift ion source.

In a process of fabricating a narrow channel width PMOSFET device, the improvement of affecting reduction of negative bias temperature instability by use of F2 side wall implantation, comprising:a) forming a shallow trench isolation (STI) region in a substrate;b) forming a gate on a gate oxide in the substrate;c) forming a liner layer in said shallow trench isolation region and subjecting the liner layer to oxidation to form a STI liner oxidation layer;d) implanting F2 into side walls of the STI liner oxidation layer at a large tilted angle in sufficient amounts to affect reduction of negative bias temperature instability after a high density plasma fill of the STI F2 implanted liner oxidation layer; ande) filling the STI F2 implanted structure from step d) with a high density plasma (HDP) fill to affect reduction of negative bias temperature instability.

The invention relates to a nanofiltration membrane blending based high salinity wastewater zero discharge processing method, and a device. The nanofiltration membrane blending based high salinity wastewater zero discharge processing method mainly comprises following steps: high salinity wastewater is delivered through a pretreatment system for impurity removing, salt extraction concentration, andsoftening; softened concentrated water is introduced into a nanofiltration blending system for blending of the concentrations of monovalent and divalent salts, so that the monovalent salt to divalentsalt concentration ratio is controlled to be 0.01 to 0.1; concentrated water discharged from the nanofiltration blending system is introduced into a sodium sulfate crystallization system for processing so as to obtain divalent salt products capable of satisfying industrial salt requirements and a sodium chloride-containing mother liquor; an obtained nanofiltration blending system penetrating fluidis delivered through an extraction concentration system, and is introduced into a sodium chloride crystallization system so as to obtain sodium chloride salt products and a sodium sulfate-containingmother liquor; the sodium chloride crystallization mother liquor is subjected to impurity removing, and is introduced into the sodium sulfate crystallization system; the sodium sulfate crystallizationmother liquor is subjected to impurity removing, and is introduced into the sodium chloride crystallization system. The nanofiltration membrane blending based high salinity wastewater zero dischargeprocessing method is capable of realizing wastewater zero discharge, and stabilizing salinity fluctuation in the crystallization systems.

The invention provides a brake force real-time adjusting method based on a brake-by-wire system. The brake force real-time adjusting method comprises following steps: respectively obtaining objective position signal values of motors in various electronic and mechanical brakes of front wheels and / or rear wheels of a brake vehicle according to strokes of electronic brake pedals; respectively acquiring actual position signal values, actual rotation speed signal values and actual current signal values of the motors in real time; and respectively realizing real-time closed-loop control for positions, rotation speeds and current of the motors according to deviation between the objective position signal values and the actual position signal values of the motors, the actual rotation speed signal values and the actual current signal values, and accordingly adjusting actually outputted brake force of the electronic and mechanical brakes with the motors in real time. Correspondingly, the invention provides a brake force real-time adjusting device. The brake force real-time adjusting method and the adjusting device can suppress fluctuation generated when brake force is adjusted in real time in the prior art, stability of the brake-by-wire system is improved, and a braking effect is good.

It is an object to provide an electric power steering apparatus capable of preventing torque steer or deflection during braking, a control method thereof and a program for the electric power steering apparatus. An electric power steering apparatus controlling a steering assist motor 20 based on a steering assist command value I calculated based on steering torque T occurring to a steering system of a vehicle and a vehicle speed V, and a current detection value Im of the steering assist motor 20 which gives a steering assist force to the steering system, wherein a compensation control section 70 conducts compensation control that compensates steering characteristics of the steering system by compensating the steering assist command value I, and changes a compensation amount of the compensation control based on longitudinal acceleration αx of the vehicle.

In a multi-blade centrifugal fan in which an impeller is provided in a scroll casing in a freely rotatable manner, the scroll casing is provided with an axially expanded portion that forms an air channel at a bottom surface thereof which is expanded in a rotation-axis direction at a radially outer side of an annular flange portion which supports the impeller; and is provided, in a region of an outlet between a tongue portion and a spiral-end portion of the scroll casing in the axially expanded portion, with a protrusion that protrudes radially outward from a radially inner side surface by a predetermined amount so as to directly face an airflow in a circumferential direction.

A magnetic bearing system for use in a vacuum pump including a motor provided with a rotary blade. The magnetic bearing system including a rotary shaft rotationally holding said rotor, a motor for rotationally driving said rotary shaft, a magnetic levitation section for supporting said rotor relative to a stator through said rotary shaft in a non-contact manner, a rotation detection section for detecting a rotational speed of said rotor, a rotor-temperature detection section for detecting a temperature of said rotor; a carrier-wave generation section for supplying a common carrier wave to each of a plurality of sensors provided in said magnetic levitation section, said rotation detection section and said rotor-temperature detection section, and an A / D conversion section for sampling a sensor signal output from each of said sensors, in synchronization with said carrier wave.

Disclosed is a magnetic bearing system for use in a vacuum pump including a rotor provided with a rotary blade. The magnetic bearing system comprises a rotary shaft rotationally holding the rotor, a motor for rotationally driving the rotary shaft, a magnetic levitation section for supporting the rotor relative to a stator through the rotary shaft in a non-contact manner, a rotation detection section for detecting a magnetic pole position of the motor, a rotor-temperature detection section for detecting a temperature of the rotor, a carrier-wave generation section for supplying a common carrier wave to each of a plurality of sensors provided in the magnetic levitation section, the rotation detection section and the rotor-temperature detection section, and an A / D conversion section for sampling a sensor signal output from each of the sensors, in synchronization with the carrier wave. Each of the sensors provided in the magnetic levitation section, the rotation detection section and the rotor-temperature detection section is operable to fix a relative phase relationship between respective AM modulated waves. i.e., sensor signals output from the sensors by receiving the carrier wave generated by the carrier-wave generation section

An apparatus and method for suppressing dynamic instability in a bleed duct of a gas turbine engine includes a fan bypass duct configured to permit a flow of air through the gas turbine engine. The fan bypass duct defines a fan duct surface, and the bleed duct has an inlet in fluid communication with the fan bypass duct and a flow control valve having an opened position and a closed position. A flow diverter is positioned on the fan duct surface proximate the inlet of the bleed duct and diverts the flow of air from the inlet when the flow control valve is closed, while permitting a portion of the flow of air to enter the inlet when the flow control valve is opened.

A system for suppressing combustion instability in a turbomachine includes at least one combustion chamber operatively connected to the turbomachine, and at least one pre-mixer mounted to the at least one combustion chamber. The at least one pre-mixer is configured to receive an amount of fuel and an amount of air that is combined and discharged into the at least one combustion chamber. In addition, the turbomachine includes a combustion instability suppression system operatively associated with the at least one pre-mixer. The combustion instability suppression system is configured to create a combustion asymmetry. The combustion asymmetry facilitates combustion instability suppression in the turbomachine.

A Hall-type ion source for generation of ion beams for technological applications presents itself a hybrid ion source, where properties of closed drift systems and end-Hall ion sources are combined for more efficient operation. An ion source has shorter central magnetic pole than regular closed drift ion source with magnetic screens that provide positive magnetic gradient in an ion source's discharge channel. An ion source with these combined properties has higher ratio of ion beam current to discharge current than end-Hall ion source and wider range of discharge parameters than closed drift ion source.

A wind turbine-permanent magnet synchronous generator (WT-PMSG) system includes a variable speed permanent magnet synchronous generator and utilizes a static synchronous compensator (STATCOM) connected on the grid side of the system. A PI / PID controller is designed to apply modulation index control signals to the generator side-converter since the modulation index of the generator side-converter has been determined to have the higher controllability to damp the oscillatory modes of the system when the STATCOM is located at the grid side converter. The controller gains are tuned through a frequency based optimization procedure. This configuration dampens voltage instabilities to provide LVRT compliance.

In a process of fabricating a narrow channel width PMOSFET device, the improvement of affecting reduction of negative bias temperature instability by use of F2 side wall implantation, comprising: a) forming a shallow trench isolation (STI) region in a substrate; b) forming a gate on a gate oxide in the substrate; c) forming a liner layer in said shallow trench isolation region and subjecting the liner layer to oxidation to form a STI liner oxidation layer; d) implanting F2 into side walls of said STI liner oxidation layer at a large tilted angle in sufficient amounts to affect reduction of negative bias temperature instability after a high density plasma fill of the STI F2 implanted liner oxidation layer; and e) filling the STI F2 implanted structure from step c) with a high density plasma (HDP) fill to affect reduction of negative bias temperature instability.

A reverse conducting semiconductor device having an IGBT element region and a diode element region in one semiconductor substrate is provided. An electric current detection region is arranged adjacent to the IGBT element region, and a collector region of the IGBT element region is extended to connect with a collector region of the electric current detection region. Instability in the IGBT detection current caused by a boundary portion between the IGBT and the diode can be suppressed. In the same way, an electric current detection region is arranged adjacent to the diode element region, and a cathode region of the diode element region is extended to connect with a cathode region of the electric current detection region. Instability in the diode detection current caused by the boundary portion between the IGBT and the diode can be suppressed.

The invention discloses an adaptive switching method of an SU-MIMO mode and an MU-MIMO mode and an adaptive switching apparatus thereof. Estimation is carried out on a current signal environment to calculate SINRs of an SU-MIMO mode and an MU-MIMO mode; according to the SINRs, table looking up is carried out to obtain matched modulation modes and error rates; and then, spectral efficiencies of the two modes are calculated and then are compared as well as the mode with the high spectral efficiency is used as an optimal mode in a channel environment. In addition, a tolerance mechanism is added in the switching process so as to avoid a ping-pong effect. According to the invention, characteristics of stable performance, a few response time and low system load can be realized.

A p well serving as a channel region of a MOSFET is formed on one side of an n− layer and an n+ drain region is formed on the other side. Above the n− layer, a plurality of first floating field plates are formed with a first insulating film interposed therebetween. A plurality of second floating field plates are formed thereon with a second insulating film interposed therebetween. Assuming that the thickness of the first insulating film is “a” and the distance between the first floating field plates and the second floating field plates in a direction of thickness of the second insulating film is “b”, a relation a>b is held.

The present inventors revealed that deamidation of an antibody can be suppressed without influencing its activity by substituting a glycine that is located adjacent to an asparagine with another amino acid.

By installing a cylinder 53x having a bell-mouth construction to the downstream side of a combustor basket 2a and by providing different level to the downstream-side end of the cylinder 53x, notches 60 are constructed. The notches 60 form fixed vortices in the compressed air, and the vortices enable the compressed air to determine the flow direction thereof so as to flow toward the tips of the main nozzles 22.

A control system for an internal combustion engine, which makes it possible to estimate a fuel property parameter indicative of a property of fuel in use, in a plurality of operation modes of the engine, respectively, to thereby increase the chances of estimation of the fuel property parameter, and select an appropriate one from the estimated fuel property parameters to thereby more appropriately control the engine. The fuel property parameter is estimated when the detected operating conditions of the engine correspond to any of a plurality of operation modes. Depending on a plurality of fuel property parameters estimated in respective operation modes, one of the fuel property parameters is determined as the fuel property parameter for control of the engine.

Provided in a vehicle, in which front wheels are provided so as to be braked by disc brakes and rear wheels are provided so as to be braked by drum brakes, is an automatic braking control section that controls the deceleration of the vehicle by adjusting only the hydraulic pressure applied to the disc brakes when the automatic braking control is performed. Thus, when the automatic braking control is performed, the braking force of the drum brakes is not adjusted and therefore, it is possible to suppress the instability of the deceleration of the vehicle caused by adjusting the braking force of the drum brakes of which the braking force is difficult to control. As a result, it is possible to stabilize braking when the automatic braking is performed.

In a multi-blade centrifugal fan in which an impeller is provided in a scroll casing in a freely rotatable manner, the scroll casing is provided with an axially expanded portion that forms an air channel at a bottom surface thereof which is expanded in a rotation-axis direction at a radially outer side of an annular flange portion which supports the impeller; and is provided, in a region of an outlet between a tongue portion and a spiral-end portion of the scroll casing in the axially expanded portion, with a protrusion that protrudes radially outward from a radially inner side surface by a predetermined amount so as to directly face an airflow in a circumferential direction.

The invention relates to a disk drive device and calibration method thereof, which can help to prevent destabilization in VCM velocity control. According to the embodiment, an HDC / MPU 23 calibrates a correction operational coefficient of a detected back EMF voltage before unloading. The calibration is carried out in a state that an actuator 16 is pivoting. The HDC / MPU 23 calibrates the correction coefficient according to a motion equation of the actuator 16 using VCM current applied to a VCM 15 and a detected value of a back EMF voltage detection circuit 221.